CN203551744U - Electric energy meter load switch state detection circuit - Google Patents
Electric energy meter load switch state detection circuit Download PDFInfo
- Publication number
- CN203551744U CN203551744U CN201320616553.0U CN201320616553U CN203551744U CN 203551744 U CN203551744 U CN 203551744U CN 201320616553 U CN201320616553 U CN 201320616553U CN 203551744 U CN203551744 U CN 203551744U
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- Prior art keywords
- diode
- capacitor
- electric energy
- energy meter
- load switch
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Abstract
The utility model discloses an electric energy meter load switch state detection circuit; an anode of a diode VD1 is connected with a live line; a cathode of the diode VD1 is connected with pin1 of an optoelectronic coupler E1 and a cathode of a diode VD2; one end of a resistor R1 is connected with a zero line; the other end of the resistor R1 is connected with an anode of the diode VD2 and a pin 2 of the optoelectronic coupler E1; a pin 4 of the optoelectronic coupler E1 is connected with a DC power end and one end of a capacitor C1; the other end of the capacitor C1 is connected with a common earthing end; a pin 3of the optoelectronic coupler E1 is connected with one end of a resistor R2, one end of a capacitor C2 and one end of a resistor R3; the other end of the resistor R2 and the other end of the capacitor C2 are connected with the common earthing end; the other end of the resistor R3 is a signal output end. The detection circuit can test whether the circuit is disconnected or not.
Description
Technical field
The utility model relates to electric energy meter technical field, is specifically a kind of testing circuit of electric energy meter on-load switch state.
Background technology
The on-load switch of electric energy meter is when "on" position, if there is no electrical appliance electricity consumption, the same in gate-dividing state with on-load switch, and the detection electric current of electric energy meter is zero, is therefore difficult to the state of judgement on-load switch.Therefore in actual use procedure, if on-load switch breaks down, when in gate-dividing state, still there is no disconnecting circuit, electric security incident very easily occurs.Therefore, for these reasons, urgently need a kind of testing circuit of the electric energy meter on-load switch state can testing circuit whether disconnecting, to address the above problem.
Utility model content
The technical problems to be solved in the utility model is, overcomes the defect of above prior art, and a kind of testing circuit of the electric energy meter on-load switch state can testing circuit whether disconnecting is provided.
The technical solution of the utility model is, a kind of testing circuit of electric energy meter on-load switch state is provided, and comprises photoelectrical coupler E1, diode VD1, VD2, resistance R 1, R2, R3 and capacitor C 1, C2; The anode of described diode VD1 is connected with live wire; The negative electrode of described diode VD1 is connected with 1 pin of photoelectrical coupler E1, the negative electrode of diode VD2; One end of described resistance R 1 is connected with zero line; The other end of described resistance R 1 is connected with the anode of diode VD2,2 pin of photoelectrical coupler E1; 4 pin of described photoelectrical coupler E1 are connected with one end of DC power supply terminal, capacitor C 1; The other end of described capacitor C 1 is connected with common ground end; 3 pin of described photoelectrical coupler E1 are connected with one end of one end of resistance R 2, capacitor C 2, one end of resistance R 3; The other end of the other end of described resistance R 2, capacitor C 2 is connected with common ground end; The other end of described resistance R 3 is signal output part.
The voltage of described DC power supply terminal is 5V.
Adopt after above structure, the utility model compared with prior art, has the following advantages:
Under the state that the testing circuit of the utility model electric energy meter on-load switch state closes a floodgate at electric energy meter on-load switch, electric current can pass through diode VD1, photoelectrical coupler E1, resistance R 1, photoelectrical coupler E1 can work like this, thereby high level signal of CHK_USER end output (voltage approximates access supply voltage), to remind operator to note; Otherwise, can not trigger photoelectrical coupler E1 work, at CHK_USER end, be output as low level.Thereby avoided to a certain extent the generation of security incident.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the testing circuit of the utility model electric energy meter on-load switch state.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, the testing circuit of a kind of electric energy meter on-load switch of the utility model state, comprises photoelectrical coupler E1, diode VD1, VD2, resistance R 1, R2, R3 and capacitor C 1, C2; The anode of described diode VD1 is connected with live wire, and the anode of described diode VD1 is connected with being subject to the live wire end of Control; The negative electrode of described diode VD1 is connected with 1 pin of photoelectrical coupler E1, the negative electrode of diode VD2; One end of described resistance R 1 is connected with zero line; The other end of described resistance R 1 is connected with the anode of diode VD2,2 pin of photoelectrical coupler E1; 4 pin of described photoelectrical coupler E1 are connected with one end of DC power supply terminal, capacitor C 1; The other end of described capacitor C 1 is connected with common ground end; 3 pin of described photoelectrical coupler E1 are connected with one end of one end of resistance R 2, capacitor C 2, one end of resistance R 3; The other end of the other end of described resistance R 2, capacitor C 2 is connected with common ground end; The other end of described resistance R 3 is signal output part.
The voltage of described DC power supply terminal is 5V, can be also 3V.
Because relay is integral type, therefore only need to detect any road in A, B, C and zero line, can control the break-make on three tunnels.Under the state that the testing circuit of the utility model electric energy meter on-load switch state closes a floodgate at electric energy meter on-load switch, electric current can pass through diode VD1, photoelectrical coupler E1, resistance R 1, photoelectrical coupler E1 can work like this, thus output high level, to remind operator to note; Otherwise, can not trigger photoelectrical coupler E1 work, be output as low level.
Below only with regard to most preferred embodiment of the present utility model, be described, but can not be interpreted as it is limitations on claims.The utility model is not limited only to above embodiment, and its concrete structure allows to change.All various variations of doing in the protection domain of the utility model independent claims are all in protection domain of the present utility model.
Claims (2)
1. a testing circuit for electric energy meter on-load switch state, is characterized in that: comprise photoelectrical coupler E1, diode VD1, VD2, resistance R 1, R2, R3 and capacitor C 1, C2; The anode of described diode VD1 is connected with live wire; The negative electrode of described diode VD1 is connected with 1 pin of photoelectrical coupler E1, the negative electrode of diode VD2; One end of described resistance R 1 is connected with zero line; The other end of described resistance R 1 is connected with the anode of diode VD2,2 pin of photoelectrical coupler E1; 4 pin of described photoelectrical coupler E1 are connected with one end of DC power supply terminal, capacitor C 1; The other end of described capacitor C 1 is connected with common ground end; 3 pin of described photoelectrical coupler E1 are connected with one end of one end of resistance R 2, capacitor C 2, one end of resistance R 3; The other end of the other end of described resistance R 2, capacitor C 2 is connected with common ground end; The other end of described resistance R 3 is signal output part.
2. the testing circuit of electric energy meter on-load switch state according to claim 1, is characterized in that: the voltage of described DC power supply terminal is 5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320616553.0U CN203551744U (en) | 2013-09-30 | 2013-09-30 | Electric energy meter load switch state detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320616553.0U CN203551744U (en) | 2013-09-30 | 2013-09-30 | Electric energy meter load switch state detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203551744U true CN203551744U (en) | 2014-04-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320616553.0U Expired - Lifetime CN203551744U (en) | 2013-09-30 | 2013-09-30 | Electric energy meter load switch state detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203551744U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698291A (en) * | 2015-02-03 | 2015-06-10 | 杭州海兴电力科技股份有限公司 | Detection circuit and detection method for three-phase four-wire system defective zero line function |
| CN109932643A (en) * | 2018-12-27 | 2019-06-25 | 杭州西力智能科技股份有限公司 | On-load switch current over-zero disjunction arc-extinguishing system and method built in a kind of single-phase electric energy meter |
| CN111722101A (en) * | 2020-05-29 | 2020-09-29 | 宁波三星医疗电气股份有限公司 | Detection circuit and protection method of double-loop relay |
-
2013
- 2013-09-30 CN CN201320616553.0U patent/CN203551744U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698291A (en) * | 2015-02-03 | 2015-06-10 | 杭州海兴电力科技股份有限公司 | Detection circuit and detection method for three-phase four-wire system defective zero line function |
| CN104698291B (en) * | 2015-02-03 | 2018-09-25 | 杭州海兴电力科技股份有限公司 | Three-phase four-wire system lacks zero curve Function detection circuit and detection method |
| CN109932643A (en) * | 2018-12-27 | 2019-06-25 | 杭州西力智能科技股份有限公司 | On-load switch current over-zero disjunction arc-extinguishing system and method built in a kind of single-phase electric energy meter |
| CN111722101A (en) * | 2020-05-29 | 2020-09-29 | 宁波三星医疗电气股份有限公司 | Detection circuit and protection method of double-loop relay |
| CN111722101B (en) * | 2020-05-29 | 2023-09-01 | 宁波三星医疗电气股份有限公司 | Detection circuit and protection method of double-loop relay |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 315191 Yinzhou Industrial Park, Zhejiang, Ningbo, Yinzhou District, Ningbo Patentee after: NINGBO SANXING MEDICAL & ELECTRIC Co.,Ltd. Address before: 315131, AUX Industrial Park, Mingguang North Road, Jiangshan Town, Ningbo, Yinzhou District, Zhejiang 1166, China Patentee before: NINGBO SANXING ELECTRIC Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |
|
| CX01 | Expiry of patent term |